This is our extreme solar fresnel lens in action. I have a GIANT Lens that is even stronger but this spot fresnel lens works perfect for heating metal using the sun.
Lens available http://www.greenpowerscience.com/SHOP…
The saw blade is solid steel. Total time through the blade was 3 minutes. All other melts were realtime.
http://www.youtube.com/user/GREENPOWE…
Post time: Jun-23-2017